C8051T610DB32 Silicon Laboratories Inc, C8051T610DB32 Datasheet - Page 151

DAUGHT BOARD T610 32TQFP SOCKET

C8051T610DB32

Manufacturer Part Number
C8051T610DB32
Description
DAUGHT BOARD T610 32TQFP SOCKET
Manufacturer
Silicon Laboratories Inc
Datasheet

Specifications of C8051T610DB32

Module/board Type
Socket Module - TQFP
Processor To Be Evaluated
C8051T61x
Interface Type
USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051T610DK
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Lead free / RoHS Compliant
Other names
336-1505
23.2. Operational Modes
UART0 provides standard asynchronous, full duplex communication. The UART mode (8-bit or 9-bit) is
selected by the S0MODE bit (SCON0.7). Typical UART connection options are shown in Figure 23.3.
23.2.1. 8-Bit UART
8-Bit UART mode uses a total of 10 bits per data byte: one start bit, eight data bits (LSB first), and one stop
bit. Data are transmitted LSB first from the TX0 pin and received at the RX0 pin. On receive, the eight data
bits are stored in SBUF0 and the stop bit goes into RB80 (SCON0.2).
Data transmission begins when software writes a data byte to the SBUF0 register. The TI0 Transmit Inter-
rupt Flag (SCON0.1) is set at the end of the transmission (the beginning of the stop-bit time). Data recep-
tion can begin any time after the REN0 Receive Enable bit (SCON0.4) is set to logic 1. After the stop bit is
received, the data byte will be loaded into the SBUF0 receive register if the following conditions are met:
RI0 must be logic 0, and if MCE0 is logic 1, the stop bit must be logic 1. In the event of a receive data over-
run, the first received 8 bits are latched into the SBUF0 receive register and the following overrun data bits
are lost.
If these conditions are met, the eight bits of data is stored in SBUF0, the stop bit is stored in RB80 and the
RI0 flag is set. If these conditions are not met, SBUF0 and RB80 will not be loaded and the RI0 flag will not
be set. An interrupt will occur if enabled when either TI0 or RI0 is set.
SPACE
MARK
BIT TIMES
BIT SAMPLING
START
BIT
D0
Figure 23.3. UART Interconnect Diagram
Figure 23.4. 8-Bit UART Timing Diagram
D1
RS-232
MCU
D2
RX
TX
Rev 1.0
D3
RS-232
LEVEL
XLTR
OR
C8051T610/1/2/3/4/5/6/7
D4
TX
RX
TX
RX
C8051xxxx
C8051xxxx
D5
D6
D7
STOP
BIT
151

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